/**
 * Created on 二〇一〇年七月二十八日 15:29:35
 * 
 */

package com.probiz.estore.webapp.action;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Hashtable;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

import org.springframework.web.servlet.ModelAndView;

import com.probiz.estore.common.helper.ConfigUtil;
import com.probiz.estore.core.controller.BaseController;

public class UploadFilesViewController extends BaseController {
	/**
	 * 浏览媒体库
	 * 
	 * @param request
	 * @param response
	 * @return
	 */
	public ModelAndView defaultAction(HttpServletRequest request,
			HttpServletResponse response) {
		ModelAndView mv = new ModelAndView("content/uploadFilesView");
		String uri = request.getRequestURI();
		String contentMedia="";
		if(uri.contains("-")){
			contentMedia=uri.substring(uri.indexOf("-")+1, uri.indexOf("/blank.html"))+"/";
		}
		String returnMsg="";
		PrintWriter out;
		try {
			out = response.getWriter();
			ConfigUtil configUtil=ConfigUtil.getInstance();
			
			//根目录路径，可以指定绝对路径，比如 E:/workspace-v35/StoreFront/web/media/
			String rootPath = configUtil.getMediaUploadPath()+"/"+contentMedia;
			//根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/media/
			String rootUrl  = configUtil.getMediaViewPath()+"/"+contentMedia;
			//图片扩展名
			String[] fileTypes = new String[]{"gif", "jpg", "jpeg", "png", "bmp"};	
			//根据path参数，设置各路径和URL
			String path = request.getParameter("path") != null ? request.getParameter("path") : "";
			String currentPath = rootPath + path;
			String currentUrl = rootUrl + path;
			String currentDirPath = path;
			String moveupDirPath = "";
			if (!"".equals(path)) {
				String str = currentDirPath.substring(0, currentDirPath.length() - 1);
				moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0, str.lastIndexOf("/") + 1) : "";
			}
	
			//排序形式，name or size or type
			String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";
	
			//不允许使用..移动到上一级目录
			if (path.indexOf("..") >= 0) {
				returnMsg="Access is not allowed.";
				mv.addObject("returnMsg", returnMsg);
				return mv;
			}
			//最后一个字符不是/
			if (!"".equals(path) && !path.endsWith("/")) {
				returnMsg="Parameter is not valid.";
				mv.addObject("returnMsg", returnMsg);
				return mv;
			}
			//目录不存在或不是目录
			File currentPathFile = new File(currentPath);
			if(!currentPathFile.isDirectory()){
				//out.println("Directory does not exist.");
				returnMsg="Directory does not exist.";
				mv.addObject("returnMsg", returnMsg);
				return mv;
			}
	
			//遍历目录取的文件信息
			List<Hashtable> fileList = new ArrayList<Hashtable>();
			if(currentPathFile.listFiles() != null) {
				for (File file : currentPathFile.listFiles()) {
					Hashtable<String, Object> hash = new Hashtable<String, Object>();
					String fileName = file.getName();
					if(file.isDirectory()) {
						hash.put("is_dir", true);
						hash.put("has_file", (file.listFiles() != null));
						hash.put("filesize", 0L);
						hash.put("is_photo", false);
						hash.put("filetype", "");
					} else if(file.isFile()){
						String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
						hash.put("is_dir", false);
						hash.put("has_file", false);
						hash.put("filesize", file.length());
						hash.put("is_photo", Arrays.<String>asList(fileTypes).contains(fileExt));
						hash.put("filetype", fileExt);
					}
					hash.put("filename", fileName);
					hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
					fileList.add(hash);
				}
			}
	
			if ("size".equals(order)) {
				Collections.sort(fileList, new SizeComparator());
			} else if ("type".equals(order)) {
				Collections.sort(fileList, new TypeComparator());
			} else {
				Collections.sort(fileList, new NameComparator());
			}
			JSONObject result = new JSONObject();
			result.put("moveup_dir_path", moveupDirPath);
			result.put("current_dir_path", currentDirPath);
			result.put("current_url", currentUrl);
			result.put("total_count", fileList.size());
			result.put("file_list", fileList);
			JSONObject jsonMap = JSONObject.fromObject(result);
			//response.setContentType("application/json; charset=UTF-8");
			//out.println(jsonMap);	

			mv.addObject("returnMsg", jsonMap);
			return mv;			
		} catch (IOException e) {
			e.printStackTrace();
		}		
		return mv;
	}
	public class NameComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filename")).compareTo((String)hashB.get("filename"));
			}
		}
	}
	public class SizeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long)hashA.get("filesize")) > ((Long)hashB.get("filesize"))) {
					return 1;
				} else if (((Long)hashA.get("filesize")) < ((Long)hashB.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}
	public class TypeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filetype")).compareTo((String)hashB.get("filetype"));
			}
		}
	}


}

